陕西关中地区在小麦、玉米两熟栽培条件下,因受生育季节的限制,在秋收、秋播阶段常因时间紧迫、来不及施底肥、整地粗且播期延迟等原因,小麦形成三类苗。为了克服这些困难,在玉米的收获期方面是否有某些潜力存在,有关资料的说法不尽一致。为了找到一个对玉米产量没有显著影响的适期早收的时间界限,近五年间,对八个品种的春、夏玉米进行了收 Due to the limitation of the breeding season, wheat in the Guanzhong region of Shaanxi Province is under three cropping conditions. Due to the time constraints in the autumn harvest and autumn sowing, it is too late to apply the base fertilizer, rough preparation and delay of sowing. Three types of seedlings are formed in wheat. In order to overcome these difficulties, there is some potential for the harvest of corn and the information is not consistent. In order to find a time limit for early maturity of early maturity that had no significant effect on maize production, spring and summer maize varieties were harvested from eight varieties in the past five years